NixOS/nixpkgs — pull request #5405 by nbp (2014-12-19 21:39:18+00:00)
Title: nixos-option: Print the outPath of derivation for option values.

This patch fix issue #5243, by filtering the output of the option before printing it. The filtering is done in Nix, which prevent the strict evaluation from recursively iterating over the dependencies of the derivation produced by fetchurl.